Great question, the responses it'll elicit will vary from agent to agent and from region to region. There are numerous trainers and systems out there from which you can model a good operation. However, if you're planning to hire assistants, you might also want to explore the other side of this plan -- managing a system and/or managing a team. Start by reading (or re-reading) The E-Myth, M. Gerber; you may also want to explore a book on Franchising, a few come to mind, but you may want to look through your local library to see what may interest you. If you're looking for that silver bullet approach, you ought to consider Craig Proctor or Keller Williams (book, Millionaire Agent), both of these resources offer great insights on the how to, the latter is a book so you won't have to spend a lot, but you'll certainly have to read the book more than once. The former, on the other hand, will sell you a work shop, a summit, a conference and system and a couching routine, if you let them, but it is all good. Hope this helps, shoot me an email, I've tried many of these and can tell you they all offer something innate in all of us -- common sense.
J. Mario Preza, CRB